竹炭净化文物保存微环境中低浓度二氧化硫的研究

Research of bamboo carbon on purifying the low concentration SO_2 in cultural relics conservation environment

为探索竹炭在文物保存环境领域的应用特征,研究了不同粒径竹炭对于SO_2净化的影响并测定了竹炭的吸附量,研究了竹炭净化二元混合污染物耦合的效果。结果表明:相比果壳、柳壳、椰壳3种生物质炭,竹炭净化SO_2的效果最佳,当粒径小于1.7mm时,净化效率达到(99.6±0.2)%;单位质量的竹炭对SO_2的吸附容量为8.46mg/g;此外,低浓度NO和NO_2对SO_2没有抑制作用,但高浓度NO_x对SO_2净化有较大的抑制作用,当NO浓度为536μg/m^3时SO_2的净化效果较NO浓度为268μg/m^3时降低了2.9%;当NO_2的浓度从411μg/m^3上升至821μg/m^3时,SO_2的净化效果降低了5.7%,而SO_2对于甲酸、乙酸的净化效果抑制作用在-1%以内,且在实验浓度范围内的SO_2受甲酸、乙酸影响较低,平均净化效率分别为90.4%和90.5%。

In this paper, the influence of particle size on SO2 adsorption by bamboo carbon （BC） was studied and its adsorption capacity was determined. The ability of BC to adsorb mixed binary pollutants was also studied. The results show that BC has better capacity for SO2 adsorption, compared with three other biomass - based activated carbons. The adsorption efficiency reached 99.6 - 0.2% when BC particle size was smaller than 1.7 mm. The unit SO2 adsorption capacity of BC reached 8.46 mg/g of BC. No inhibition of SO2 adsorption was found when NO and NO2 concentration were low higher concentration NOx were found to inhibit SO2 purification. The purification efficiency of SO2 reduced 2.9% when NO concentration increased from 268 μg,/m3 to 536 I＆g/m3. While it decreased 5.7% when NO2 concentration increased from 411 μg/m3 to 821 μg/m3. The inhibition of formic acid, acetic acid purification by SOa ranged within 1%. Within the range of experimental concentrations, lower inhibition of SOe purification by formic acid and acetic acid was found, and the average SO2 purification efficiency were 90.4% and 90.5%, respectively.